What sort of shooting have you been invited to do?
Bank job, train robbery, wages heist?
Seriously, if it's hunting then they're not suitable calibre wise, and if it's target shooting then you'll have to conform with our laws.
You can get dispensation from the Home Office, but the reasons you give will have to be very good, and I doubt there are such good reasons out there, or we'd all be doing it. I have an European firearms pass, and I have the right to live in any EU country, but I still have to obey the laws of that country when I'm there.
Sorry.